heart

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Across
  1. 2. breath in. breath out
  2. 3. inferior or superior
  3. 6. red
  4. 8. 2
  5. 10. 2
  6. 11. trees produce this
  7. 12. ->
Down
  1. 1. atrium to ventricle
  2. 4. muscle
  3. 5. <-
  4. 7. lubba dubba
  5. 9. 4